package com.yupi.springbootinit.controller;

import cn.hutool.core.io.FileUtil;
import com.alibaba.excel.support.ExcelTypeEnum;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.yupi.springbootinit.annotation.AuthCheck;
import com.yupi.springbootinit.bizmq.BiMessageProducer;
import com.yupi.springbootinit.common.BaseResponse;
import com.yupi.springbootinit.common.DeleteRequest;
import com.yupi.springbootinit.common.ErrorCode;
import com.yupi.springbootinit.common.ResultUtils;
import com.yupi.springbootinit.constant.CommonConstant;
import com.yupi.springbootinit.constant.UserConstant;
import com.yupi.springbootinit.exception.BusinessException;
import com.yupi.springbootinit.exception.ThrowUtils;
import com.yupi.springbootinit.manager.BiChatManager;
import com.yupi.springbootinit.manager.RedisLimiterManager;
import com.yupi.springbootinit.model.dto.chart.*;
import com.yupi.springbootinit.model.entity.Chart;
import com.yupi.springbootinit.model.entity.User;
import com.yupi.springbootinit.model.vo.BiResponse;
import com.yupi.springbootinit.service.ChartService;
import com.yupi.springbootinit.service.UserService;
import com.yupi.springbootinit.utils.ExcelUtils;
import com.yupi.springbootinit.utils.JDBCUtils;
import com.yupi.springbootinit.utils.SqlUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.ObjectUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 帖子接口
 *
 * @author <a href="https://github.com/liyupi">程序员鱼皮</a>
 * @from <a href="https://yupi.icu">编程导航知识星球</a>
 */
@RestController
@RequestMapping("/chart")
@Slf4j
public class ChartController {

    @Resource
    private ChartService chartService;

    @Resource
    private UserService userService;
    
    @Resource
    private BiChatManager biChatManager;
    
    @Resource
    private RedisLimiterManager redisLimiterManager;

    @Resource
    private ThreadPoolExecutor threadPoolExecutor;
    
    @Resource
    private BiMessageProducer biMessageProducer;
    
    // region 增删改查

    /**
     * 创建
     *
     * @param chartAddRequest
     * @param request
     * @return
     */
    @PostMapping("/add")
    public BaseResponse<Long> addChart(@RequestBody ChartAddRequest chartAddRequest, HttpServletRequest request) {
        if (chartAddRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        Chart chart = new Chart();
        BeanUtils.copyProperties(chartAddRequest, chart);
        User loginUser = userService.getLoginUser(request);
        chart.setUserId(loginUser.getId());
        boolean result = chartService.save(chart);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        long newChartId = chart.getId();
        return ResultUtils.success(newChartId);
    }

    /**
     * 删除
     *
     * @param deleteRequest
     * @param request
     * @return
     */
    @PostMapping("/delete")
    public BaseResponse<Boolean> deleteChart(@RequestBody DeleteRequest deleteRequest, HttpServletRequest request) {
        if (deleteRequest == null || deleteRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User user = userService.getLoginUser(request);
        long id = deleteRequest.getId();
        // 判断是否存在
        Chart oldChart = chartService.getById(id);
        ThrowUtils.throwIf(oldChart == null, ErrorCode.NOT_FOUND_ERROR);
        // 仅本人或管理员可删除
        if (!oldChart.getUserId().equals(user.getId()) && !userService.isAdmin(request)) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }
        boolean b = chartService.removeById(id);
        return ResultUtils.success(b);
    }

    /**
     * 更新（仅管理员）
     *
     * @param chartUpdateRequest
     * @return
     */
    @PostMapping("/update")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Boolean> updateChart(@RequestBody ChartUpdateRequest chartUpdateRequest) {
        if (chartUpdateRequest == null || chartUpdateRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        Chart chart = new Chart();
        BeanUtils.copyProperties(chartUpdateRequest, chart);
        long id = chartUpdateRequest.getId();
        // 判断是否存在
        Chart oldChart = chartService.getById(id);
        ThrowUtils.throwIf(oldChart == null, ErrorCode.NOT_FOUND_ERROR);
        boolean result = chartService.updateById(chart);
        return ResultUtils.success(result);
    }

    /**
     * 根据 id 获取
     *
     * @param id
     * @return
     */
    @GetMapping("/get")
    public BaseResponse<Chart> getChartById(long id, HttpServletRequest request) {
        if (id <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        Chart chart = chartService.getById(id);
        if (chart == null) {
            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR);
        }
        return ResultUtils.success(chart);
    }

    /**
     * 分页获取列表（封装类）
     *
     * @param chartQueryRequest
     * @param request
     * @return
     */
    @PostMapping("/list/page")
    public BaseResponse<Page<Chart>> listChartByPage(@RequestBody ChartQueryRequest chartQueryRequest,
            HttpServletRequest request) {
        long current = chartQueryRequest.getCurrent();
        long size = chartQueryRequest.getPageSize();
        // 限制爬虫
        ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
        Page<Chart> chartPage = chartService.page(new Page<>(current, size),
                getQueryWrapper(chartQueryRequest));
        return ResultUtils.success(chartPage);
    }

    /**
     * 分页获取当前用户创建的资源列表
     *
     * @param chartQueryRequest
     * @param request
     * @return
     */
    @PostMapping("/my/list/page")
    public BaseResponse<Page<Chart>> listMyChartByPage(@RequestBody ChartQueryRequest chartQueryRequest,
            HttpServletRequest request) {
        if (chartQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User loginUser = userService.getLoginUser(request);
        chartQueryRequest.setUserId(loginUser.getId());
        long current = chartQueryRequest.getCurrent();
        long size = chartQueryRequest.getPageSize();
        // 限制爬虫
        ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
        Page<Chart> chartPage = chartService.page(new Page<>(current, size),
                getQueryWrapper(chartQueryRequest));
        return ResultUtils.success(chartPage);
    }

    // endregion

    /**
     * 编辑（用户）
     *
     * @param chartEditRequest
     * @param request
     * @return
     */
    @PostMapping("/edit")
    public BaseResponse<Boolean> editChart(@RequestBody ChartEditRequest chartEditRequest, HttpServletRequest request) {
        if (chartEditRequest == null || chartEditRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        Chart chart = new Chart();
        BeanUtils.copyProperties(chartEditRequest, chart);
        User loginUser = userService.getLoginUser(request);
        long id = chartEditRequest.getId();
        // 判断是否存在
        Chart oldChart = chartService.getById(id);
        ThrowUtils.throwIf(oldChart == null, ErrorCode.NOT_FOUND_ERROR);
        // 仅本人或管理员可编辑
        if (!oldChart.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }
        boolean result = chartService.updateById(chart);
        return ResultUtils.success(result);
    }

    /**
     * 获取查询包装类
     *
     * @param chartQueryRequest
     * @return
     */
    private QueryWrapper<Chart> getQueryWrapper(ChartQueryRequest chartQueryRequest) {
        QueryWrapper<Chart> queryWrapper = new QueryWrapper<>();
        if (chartQueryRequest == null) {
            return queryWrapper;
        }
        Long id = chartQueryRequest.getId();
        String name = chartQueryRequest.getName();
        String goal = chartQueryRequest.getGoal();
        String chartType = chartQueryRequest.getChartType();
        Long userId = chartQueryRequest.getUserId();
        String sortField = chartQueryRequest.getSortField();
        String sortOrder = chartQueryRequest.getSortOrder();

        queryWrapper.eq(id != null && id > 0, "id", id);
        queryWrapper.like(StringUtils.isNotBlank(name),"name",name);
        queryWrapper.eq(StringUtils.isNotBlank(goal), "goal", goal);
        queryWrapper.eq(StringUtils.isNotBlank(chartType), "chartType", chartType);
        queryWrapper.eq(ObjectUtils.isNotEmpty(userId), "userId", userId);
        queryWrapper.eq("isDelete", false);
        queryWrapper.orderBy(SqlUtils.validSortField(sortField), sortOrder.equals(CommonConstant.SORT_ORDER_ASC),
                sortField);
        return queryWrapper;
    }
    
    /**
     * 智能分析 (同步)
     *
     * @param multipartFile
     * @param genChartByAiRequest
     * @param request
     * @return
     */
    @PostMapping("/gen")
    public BaseResponse<BiResponse> genChartByAi(@RequestPart("file") MultipartFile multipartFile,
                                                 GenChartByAiRequest genChartByAiRequest, HttpServletRequest request) throws Exception {
        String name = genChartByAiRequest.getName();
        String goal = genChartByAiRequest.getGoal();
        String chartType = genChartByAiRequest.getChartType();
        
        //校验
        //如果分析目标为空，则抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(goal),ErrorCode.PARAMS_ERROR,"目标为空");
        //如果名称不为空，并且长度大于100，就抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(name) && name.length()>100 ,ErrorCode.PARAMS_ERROR,"名字过长");
        //通过response对象拿到用户id才能使用
        User loginUser = userService.getLoginUser(request);
        
        //限流判断
        redisLimiterManager.doRateLimit("genChartByAi_" + loginUser.getId());

        /**
         * 校验文件
         */
        long size = multipartFile.getSize();
        String filename = multipartFile.getOriginalFilename();
        
        //校验文件大小
        final long ONE_ME = 1024 * 1024L;
        //如果文件大于5M,抛出异常
        ThrowUtils.throwIf(size > 5*ONE_ME, ErrorCode.PARAMS_ERROR,"文件大于5M");
        
        //校验文件后缀
        String suffix = FileUtil.getSuffix(filename);
        //定义合法的后缀列表
        final List<String> validFileSuffixList = Arrays.asList("xlsx","xls");
        ThrowUtils.throwIf(!validFileSuffixList.contains(suffix),ErrorCode.PARAMS_ERROR,"文件后缀有误");
        

        /**
         * 1. 原始数据：日期，用户数 1号 10， 2号 50， 3号 70， 4号 80， 5号 100， 6号 90，
         * 2. 分析需求：分析用户的增长情况。
         * 3. 前端图表类型：柱状图。
         */
        // 构造用户输入
        StringBuilder userInput = new StringBuilder();
        String userGoal = goal;
        //分析目标
        userInput.append("分析需求:").append(userGoal).append("\n");
        //图表类型
        userInput.append("图表类型:").append(chartType).append("\n");
        //原始数据
        userInput.append("原始数据:").append("\n");
        //传入文件,获取原始数据
        String csvData = ExcelUtils.excelToCsv(multipartFile);
        userInput.append(csvData).append("\n");
        
        //调用AI
        String result = biChatManager.chatSyncTest(userInput.toString());
        
        //对返回结果拆分
        String resRule = "分析结论：([\\s\\S]*)。";
        String genResult = matcher(resRule,result);

        String chartRule = "```json([\\s\\S]*)```";
        String genChart = matcher(chartRule,result);
        
        //插入到数据库
        Chart chart = new Chart();
        chart.setName(name);
        chart.setGoal(goal);
        chart.setChartData(csvData);
        chart.setChartType(chartType);
        chart.setGenChart(genChart);
        chart.setGenResult(genResult);
        chart.setUserId(loginUser.getId());
        chart.setStatus("succeed");
        boolean saveResult = chartService.save(chart);
        ThrowUtils.throwIf(!saveResult, ErrorCode.SYSTEM_ERROR,"图片保存失败");
        //存储csv数据到表格
        String excelToSql = ExcelUtils.excelToSql(multipartFile, "chart_" + chart.getId());
        JDBCUtils.batchSql(excelToSql);
        BiResponse biResponse = new BiResponse();
        biResponse.setGenChart(genChart);
        biResponse.setGenResult(genResult);
        biResponse.setChartId(chart.getId());
        return ResultUtils.success(biResponse);
    }

    /**
     * 智能分析 (异步)
     *
     * @param multipartFile
     * @param genChartByAiRequest
     * @param request
     * @return
     */
    @PostMapping("/gen/async")
    public BaseResponse<BiResponse> genChartByAiAsync(@RequestPart("file") MultipartFile multipartFile,
                                                 GenChartByAiRequest genChartByAiRequest, HttpServletRequest request) throws Exception {
        String name = genChartByAiRequest.getName();
        String goal = genChartByAiRequest.getGoal();
        String chartType = genChartByAiRequest.getChartType();

        //校验
        //如果分析目标为空，则抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(goal),ErrorCode.PARAMS_ERROR,"目标为空");
        //如果名称不为空，并且长度大于100，就抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(name) && name.length()>100 ,ErrorCode.PARAMS_ERROR,"名字过长");
        //通过response对象拿到用户id才能使用
        User loginUser = userService.getLoginUser(request);

        //限流判断
        redisLimiterManager.doRateLimit("genChartByAi_" + loginUser.getId());

        /**
         * 校验文件
         */
        long size = multipartFile.getSize();
        String filename = multipartFile.getOriginalFilename();

        //校验文件大小
        final long ONE_ME = 1024 * 1024L;
        //如果文件大于5M,抛出异常
        ThrowUtils.throwIf(size > 5*ONE_ME, ErrorCode.PARAMS_ERROR,"文件大于5M");

        //校验文件后缀
        String suffix = FileUtil.getSuffix(filename);
        //定义合法的后缀列表
        final List<String> validFileSuffixList = Arrays.asList("xlsx","xls");
        ThrowUtils.throwIf(!validFileSuffixList.contains(suffix),ErrorCode.PARAMS_ERROR,"文件后缀有误");


        /**
         * 1. 原始数据：日期，用户数 1号 10， 2号 50， 3号 70， 4号 80， 5号 100， 6号 90，
         * 2. 分析需求：分析用户的增长情况。
         * 3. 前端图表类型：柱状图。
         */
        // 构造用户输入
        StringBuilder userInput = new StringBuilder();
        String userGoal = goal;
        //分析目标
        userInput.append("分析需求:").append(userGoal).append("\n");
        //图表类型
        userInput.append("图表类型:").append(chartType).append("\n");
        //原始数据
        userInput.append("原始数据:").append("\n");
        //传入文件,获取原始数据
        String csvData = ExcelUtils.excelToCsv(multipartFile);
        userInput.append(csvData).append("\n");

        //插入到数据库
        Chart chart = new Chart();
        chart.setName(name);
        chart.setGoal(goal);
        chart.setChartData(csvData);
        chart.setChartType(chartType);
        chart.setStatus("wait");
        chart.setUserId(loginUser.getId());
        boolean saveResult = chartService.save(chart);
        ThrowUtils.throwIf(!saveResult, ErrorCode.SYSTEM_ERROR,"图片保存失败");

        CompletableFuture.runAsync(() ->{
            // 先修改图表任务状态为 “执行中”。等执行成功后，修改为 “已完成”、保存执行结果；执行失败后，状态修改为 “失败”，记录任务失败信息。
            Chart updateChart = new Chart();
            updateChart.setId(chart.getId());
            updateChart.setStatus("running");
            boolean b = chartService.updateById(updateChart);
            if (!b) {
                handleChartUpdateError(chart.getId(), "更新图表执行中状态失败");
                return;
            }

            //调用AI
            String result = null;
            try {
                result = biChatManager.chatSyncTest(userInput.toString());
            } catch (JsonProcessingException e) {
                e.printStackTrace();
            }

            //对返回结果拆分
            String resRule = "分析结论：([\\s\\S]*)。";
            String genResult = matcher(resRule,result);
            
            String chartRule = "```json([\\s\\S]*)```";
            String genChart = matcher(chartRule,result);
            
            //AI处理完成后,更新图表
            Chart updateChartResult = new Chart();
            updateChartResult.setId(chart.getId());
            updateChartResult.setGenChart(genChart);
            updateChartResult.setGenResult(genResult);
            updateChartResult.setStatus("succeed");
            boolean updateResult = chartService.updateById(updateChartResult);
            if (!updateResult) {
                handleChartUpdateError(chart.getId(), "更新图表成功状态失败");
            }
        }, threadPoolExecutor);
        
        BiResponse biResponse = new BiResponse();
        biResponse.setChartId(chart.getId());
        return ResultUtils.success(biResponse);
    }

    /**
     * 智能分析 (MQ)
     *
     * @param multipartFile
     * @param genChartByAiRequest
     * @param request
     * @return
     */
    @PostMapping("/gen/async/mq")
    public BaseResponse<BiResponse> genChartByAiAsyncMq(@RequestPart("file") MultipartFile multipartFile,
                                                      GenChartByAiRequest genChartByAiRequest, HttpServletRequest request){
        String name = genChartByAiRequest.getName();
        String goal = genChartByAiRequest.getGoal();
        String chartType = genChartByAiRequest.getChartType();

        //校验
        //如果分析目标为空，则抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(goal),ErrorCode.PARAMS_ERROR,"目标为空");
        //如果名称不为空，并且长度大于100，就抛出异常
        ThrowUtils.throwIf(StringUtils.isBlank(name) && name.length()>100 ,ErrorCode.PARAMS_ERROR,"名字过长");
        //通过response对象拿到用户id才能使用
        User loginUser = userService.getLoginUser(request);

        //限流判断
        redisLimiterManager.doRateLimit("genChartByAi_" + loginUser.getId());

        /**
         * 校验文件
         */
        long size = multipartFile.getSize();
        String filename = multipartFile.getOriginalFilename();

        //校验文件大小
        final long ONE_ME = 1024 * 1024L;
        //如果文件大于5M,抛出异常
        ThrowUtils.throwIf(size > 5*ONE_ME, ErrorCode.PARAMS_ERROR,"文件大于5M");

        //校验文件后缀
        String suffix = FileUtil.getSuffix(filename);
        //定义合法的后缀列表
        final List<String> validFileSuffixList = Arrays.asList("xlsx","xls");
        ThrowUtils.throwIf(!validFileSuffixList.contains(suffix),ErrorCode.PARAMS_ERROR,"文件后缀有误");


        /**
         * 1. 原始数据：日期，用户数 1号 10， 2号 50， 3号 70， 4号 80， 5号 100， 6号 90，
         * 2. 分析需求：分析用户的增长情况。
         * 3. 前端图表类型：柱状图。
         */
        // 构造用户输入
        StringBuilder userInput = new StringBuilder();
        String userGoal = goal;
        //分析目标
        userInput.append("分析需求:").append(userGoal).append("\n");
        //图表类型
        userInput.append("图表类型:").append(chartType).append("\n");
        //原始数据
        userInput.append("原始数据:").append("\n");
        //传入文件,获取原始数据
        String csvData = ExcelUtils.excelToCsv(multipartFile);
        userInput.append(csvData).append("\n");

        //插入到数据库
        Chart chart = new Chart();
        chart.setName(name);
        chart.setGoal(goal);
        chart.setChartData(csvData);
        chart.setChartType(chartType);
        chart.setStatus("wait");
        chart.setUserId(loginUser.getId());
        boolean saveResult = chartService.save(chart);
        ThrowUtils.throwIf(!saveResult, ErrorCode.SYSTEM_ERROR,"图片保存失败");
        Long newChartId = chart.getId();
        //发送消息
        biMessageProducer.sendMessage(String.valueOf(newChartId));
        BiResponse biResponse = new BiResponse();
        biResponse.setChartId(newChartId);
        return ResultUtils.success(biResponse);
    }


    //文本匹配
    public String matcher(String rule,String result){
        Pattern resPattern = Pattern.compile(rule);
        Matcher resMatcher = resPattern.matcher(result);
        if (resMatcher.find()){
            return resMatcher.group(1).trim();
        }else {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR,"文本查找失败");
        }
    }

    private void handleChartUpdateError(long chartId, String execMessage) {
        Chart updateChartResult = new Chart();
        updateChartResult.setId(chartId);
        updateChartResult.setStatus("failed");
        updateChartResult.setExecMessage("execMessage");
        boolean updateResult = chartService.updateById(updateChartResult);
        if (!updateResult) {
            log.error("更新图表失败状态失败" + chartId + "," + execMessage);
        }
    }


}
